When geek culture becomes mainstream it's no longer geek culture. Nerds are nerds for not fitting in with the mainstream. That said I think what they are looking for is mostly fairly normal people that happen to have one major obssessive fandom or wierd habit from the way it sounds. For example a guy who runs the biggest Superman site might be a huge Superman/DC comics fan, but I'd imagine his nerddom falls just outside of acceptable perameters. I doubt we'll be seeing many of the dudes you see attending console launches in costume, or who follow myriad fandoms to the point where they could be considered totally outside of the norm.
That said I can see where they are trying to go with this, but I'll be surprised if it goes anywhere. To some extent it seems to be to be an extension of so called "nerd chick" which is basically where people try and act slightly nerdy to get "brains" credit. For example a girl who plays the occasional game of God Of War is *NOT* a game nerd.
Hard to go into without starting a big rant, and this post is already nearing the 4 paragraph mark.
As far as Game Damage goes, I myself have tossed out the occasional query here and there but never got any responses. That said while it would have been interesting, I'm not sure if it would have done especially well even if picked up, it would have been worth seeing the attempt though.